<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>输出老子的名言</title>
</head>
<body>
    <script>
        document.write("千里之行，始于足下。")
    </script>
</body>
</html>